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Won-Tak Choi, MD, PhD

Title(s)Assistant Professor, Pathology
SchoolSchool of Medicine
Address505 Parnassus Avenue
San Francisco CA 94117
Phone415-353-9533
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    Collapse Biography 
    Collapse Education and Training
    University of Illinois MD, PhD2009Medicine
    University of California at San FranciscoResidency2010OB/GYN
    Scripps Research Institute Post-Doctoral Research Fellow2011Immunology
    University of Washington Residency2015Pathology
    University of California at San Francisco Fellowship2016Pathology
    University of California , San Francisco, CA11/2020Diversity, Equity, and Inclusion Champion Training

    Collapse Bibliographic 
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Editorial: the microscope holds the key to predict need for biologic therapy in immunotherapy-checkpoint inhibitory colitis. Authors' reply. Aliment Pharmacol Ther. 2021 Mar; 53(5):638-639. Pai RK, Pai RK, Schaeffer DF, Choi WT, Kumarasinghe P, Brown I, Lauwers GY. PMID: 33566423.
      View in: PubMed   Mentions:    Fields:    
    2. Non-Conventional Dysplastic Subtypes in Inflammatory Bowel Disease: A Review of Their Diagnostic Characteristics and Potential Clinical Implications. J Pathol Transl Med. 2021. Choi WT. .
    3. Interobserver agreement and the impact of mentorship on the diagnosis of inflammatory bowel disease-associated dysplasia among subspecialist gastrointestinal pathologists. Virchows Arch. 2021 Jan 03. Alpert L, Setia N, Ko HM, Lagana SM, Pittman ME, Johncilla M, Drage MG, Zhao L, Salomao MA, Liao X, Choi WT, Jenkins SM, Hart J, Harpaz N, Voltaggio L, Lauwers GY, Odze R, Remotti H, Smyrk TC, Graham RP. PMID: 33392796.
      View in: PubMed   Mentions:    Fields:    
    4. Non-conventional dysplasia in inflammatory bowel disease is more frequently associated with advanced neoplasia and aneuploidy than conventional dysplasia. Histopathology. 2020 Nov 05. Lee H, Rabinovitch PS, Mattis AN, Lauwers GY, Choi WT. PMID: 33155325.
      View in: PubMed   Mentions:    Fields:    
    5. The significance of histological activity measurements in immune checkpoint inhibitor colitis. Aliment Pharmacol Ther. 2021 01; 53(1):150-159. Pai RK, Pai RK, Brown I, Choi WT, Schaeffer DF, Farnell D, Kumarasinghe MP, Gunawardena D, Kim BH, Friedman M, Ghayouri M, Lauwers GY. PMID: 33146440.
      View in: PubMed   Mentions:    Fields:    
    6. Non-Conventional Dysplasia of the Tubular Gut: A Review and Illustration of Their Histomorphologic Spectrum. Histopathology. 2020; In press. Pereira D, Kovari B, Brown I, Chaves P, Choi WT, Clauditz T, Ghayouri M, Jiang K, Miller GC, Nakanishi Y, Kim KM, Kim BH, Kumarasinghe PM, Kushima R, Ushiku T, Yozu M, Srivastava A, Goldblum JR, Pai RK, Lauwers GY. View Publication.
    7. Interobserver study on histologic features of idiopathic non-cirrhotic portal hypertension. Diagn Pathol. 2020 Oct 23; 15(1):129. PMID: 33097074.
      View in: PubMed   Mentions:    Fields:    
    8. Liver epithelial focal adhesion kinase modulates fibrogenesis and hedgehog signaling. JCI Insight. 2020 Oct 15; 5(20). Weng Y, Lieberthal TJ, Zhou VX, Lopez-Ichikawa M, Armas-Phan M, Bond TK, Yoshida MC, Choi WT, Chang TT. PMID: 32910808.
      View in: PubMed   Mentions:    Fields:    
    9. Meckel Diverticulum Presenting as Abdominal Pain and Subsequent Bowel Perforation. J Emerg Med. 2020 Jun; 58(6):e251-e254. LaFlam TN, Phelps A, Choi WT, Kornblith AE. PMID: 32317193.
      View in: PubMed   Mentions:    Fields:    
    10. Utility of DNA flow cytometry in distinguishing between malignant and benign intrahepatic biliary lesions. Virchows Arch. 2020 Oct; 477(4):527-534. Wen KW, Rabinovitch PS, Wang D, Mattis AN, Ferrell LD, Choi WT. PMID: 32296928.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    11. DNA flow cytometric analysis of paraffin-embedded tissue for the diagnosis of malignancy in bile duct biopsies. Hum Pathol. 2020 05; 99:80-87. Lee H, Rabinovitch PS, Mattis AN, Kakar S, Choi WT. PMID: 32272125.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    12. Nonconventional dysplasia in patients with inflammatory bowel disease and colorectal carcinoma: a multicenter clinicopathologic study. Mod Pathol. 2020 05; 33(5):933-943. Choi WT, Yozu M, Miller GC, Shih AR, Kumarasinghe P, Misdraji J, Harpaz N, Lauwers GY. PMID: 31822800.
      View in: PubMed   Mentions:    Fields:    
    13. Clinicopathological features of pyloric gland adenomas of the duodenum: a multicentre study of 57 cases. Histopathology. 2020 Feb; 76(3):404-410. Miller GC, Kumarasinghe MP, Borowsky J, Choi WT, Setia N, Clauditz T, Gidwani R, Sufiyan W, Lauwers GY, Brown IS. PMID: 31529725.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    14. DNA flow cytometric and interobserver study of crypt cell atypia in inflammatory bowel disease. Histopathology. 2019 Oct; 75(4):578-588. Wen KW, Umetsu SE, Goldblum JR, Gill RM, Kim GE, Joseph NM, Rabinovitch PS, Kakar S, Lauwers GY, Choi WT. PMID: 31111543.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    15. Utility of glutamine synthetase immunohistochemistry in identifying features of regressed cirrhosis. Mod Pathol. 2020 03; 33(3):448-455. Hadi R, Shin K, Reder N, Alpert L, Koch L, Choi WT, Swanson PE, Hart J, Westerhoff M. PMID: 31391527.
      View in: PubMed   Mentions: 1     Fields:    
    16. Diagnosis, risk stratification, and management of ampullary dysplasia by DNA flow cytometric analysis of paraffin-embedded tissue. Mod Pathol. 2019 09; 32(9):1291-1302. Wen KW, Kim GE, Rabinovitch PS, Wang D, Mattis AN, Choi WT. PMID: 30976103.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    17. Utility of DNA Flow Cytometric Analysis of Paraffin-embedded Tissue in the Risk Stratification and Management of 'Indefinite for dysplasia' in Patients With Inflammatory Bowel Disease. J Crohns Colitis. 2019 Mar 30; 13(4):472-481. Wen KW, Rabinovitch PS, Wang D, Huang D, Mattis AN, Choi WT. PMID: 30423034.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    18. The differential diagnosis of Helicobacter pylori negative gastritis. Virchows Arch. 2018 Nov; 473(5):533-550. El-Zimaity H, Choi WT, Lauwers GY, Riddell R. PMID: 30255340.
      View in: PubMed   Mentions:    Fields:    Translation:HumansCells
    19. Atypical Hepatocellular Neoplasms: Review of Clinical, Morphologic, Immunohistochemical, Molecular, and Cytogenetic Features. Adv Anat Pathol. 2018 Jul; 25(4):254-262. Choi WT, Kakar S. PMID: 29649004.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    20. DNA content analysis of colorectal serrated lesions detects an aneuploid subset of inflammatory bowel disease-associated serrated epithelial change and traditional serrated adenomas. Histopathology. 2018 Sep; 73(3):464-472. Choi WT, Wen KW, Rabinovitch PS, Huang D, Mattis AN, Gill RM. PMID: 29772067.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    21. Use of DNA flow cytometry in the diagnosis, risk stratification, and management of gastric epithelial dysplasia. Mod Pathol. 2018 10; 31(10):1578-1587. Wen KW, Rabinovitch PS, Huang D, Mattis AN, Lauwers GY, Choi WT. PMID: 29789650.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    22. Hepatic Lymphoma Diagnosis. Surg Pathol Clin. 2018 Jun; 11(2):389-402. Choi WT, Gill RM. PMID: 29751882.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    23. Gastric pyloric gland adenoma: a multicentre clinicopathological study of 67 cases. Histopathology. 2018 May; 72(6):1007-1014. Choi WT, Brown I, Ushiku T, Yozu M, Setia N, Srivastava A, Johncilla M, Pai RK, Gill RM, Fukayama M, Misdraji J, Lauwers GY. PMID: 29278427.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    24. Solitary fibrous tumor in the abdomen and pelvis: A case series with radiological findings and treatment recommendations. Clin Imaging. 2018 Mar - Apr; 48:48-54. Fernandez A, Conrad M, Gill RM, Choi WT, Kumar V, Behr S. PMID: 29028514.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    25. Patterns of Gastric Injury: Beyond Helicobacter Pylori. Surg Pathol Clin. 2017 Dec; 10(4):801-822. Choi WT, Lauwers GY. PMID: 29103534.
      View in: PubMed   Mentions: 1     Fields:    Translation:HumansCells
    26. Centrilobular ductular reaction correlates with fibrosis stage and fibrosis progression in non-alcoholic steatohepatitis. Mod Pathol. 2018 01; 31(1):150-159. Zhao L, Westerhoff M, Pai RK, Choi WT, Gao ZH, Hart J. PMID: 28862262.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    27. Association of Aneuploidy and Flat Dysplasia With Development of High-Grade Dysplasia or Colorectal Cancer in Patients With Inflammatory Bowel Disease. Gastroenterology. 2017 12; 153(6):1492-1495.e4. PMID: 28843957.
      View in: PubMed   Mentions: 4     Fields:    Translation:Humans
    28. Diagnosis and risk stratification of Barrett's dysplasia by flow cytometric DNA analysis of paraffin-embedded tissue. Gut. 2018 07; 67(7):1229-1238. PMID: 28642331.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    29. Immunohistochemistry in the Diagnosis of Hepatocellular Carcinoma. Gastroenterol Clin North Am. 2017 06; 46(2):311-325. PMID: 28506367.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    30. Biopsy Specimens From Allograft Liver Contain Histologic Features of Hepatitis C Virus Infection After Virus Eradication. Clin Gastroenterol Hepatol. 2017 Aug; 15(8):1279-1285. Whitcomb E, Choi WT, Jerome KR, Cook L, Landis C, Ahn J, Te HS, Esfeh J, Hanouneh IA, Rayhill SC, Gibson W, Plesec T, Koo J, Wang HL, Hart J, Pai RK, Westerhoff M. PMID: 28501538.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    31. Donor Liver Small Droplet Macrovesicular Steatosis Is Associated With Increased Risk for Recipient Allograft Rejection. Am J Surg Pathol. 2017 Mar; 41(3):365-373. PMID: 28059835.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    32. Immunohistochemical approach for the diagnosis of a liver mass on small biopsy specimens. Hum Pathol. 2017 05; 63:1-13. PMID: 28087475.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    33. Gastrointestinal Zygomycosis Masquerading as Acute Appendicitis. Case Rep Gastroenterol. 2016 Jan-Apr; 10(1):81-7. PMID: 27403107.
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    34. Significance of CD10-positive clonal B cell populations identified by flow cytometry in histologically benign gastric biopsies. J Hematop. 2016; 2(9):59-66. Choi WT, Cherian S, Soma L. View Publication.
    35. The outcomes of "atypical" and "suspicious" bile duct brushings in the identification of pancreaticobiliary tumors: Follow-up analysis of surgical resection specimens. Diagn Cytopathol. 2015 Nov; 43(11):885-91. PMID: 26221777.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    36. Outcome of "indefinite for dysplasia" in inflammatory bowel disease: correlation with DNA flow cytometry and other risk factors of colorectal cancer. Hum Pathol. 2015 Jul; 46(7):939-47. PMID: 25962315.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    37. "Indefinite for Dysplasia" in Barrett's Esophagus: Inflammation and DNA Content Abnormality are Significant Predictors of Early Detection of Neoplasia. Clin Transl Gastroenterol. 2015 Mar 12; 6:e81. PMID: 25761942.
      View in: PubMed   Mentions: 2     Fields:    
    38. Targeting chemokine receptor CXCR4 for treatment of HIV-1 infection, tumor progression, and metastasis. Curr Top Med Chem. 2014; 14(13):1574-89. PMID: 25159167.
      View in: PubMed   Mentions: 13     Fields:    Translation:HumansAnimalsCells
    39. Cutaneous angiosarcoma clinically presenting as progressive solid facial edema in a 43-year-old male. Dermatol Online J. 2013 Nov 15; 19(11):20409. PMID: 24314784.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    40. A novel synthetic bivalent ligand to probe chemokine receptor CXCR4 dimerization and inhibit HIV-1 entry. Biochemistry. 2012 Sep 11; 51(36):7078-86. PMID: 22897429.
      View in: PubMed   Mentions: 15     Fields:    Translation:Cells
    41. Critical role in CXCR4 signaling and internalization of the polypeptide main chain in the amino terminus of SDF-1a probed by novel N-methylated synthetically and modularly modified chemokine analogues. Biochemistry. 2012 Jul 31; 51(30):5951-7. PMID: 22779681.
      View in: PubMed   Mentions: 3     Fields:    Translation:HumansCells
    42. CCR5 mutations distinguish N-terminal modifications of RANTES (CCL5) with agonist versus antagonist activity. J Virol. 2012 Sep; 86(18):10218-20. PMID: 22787219.
      View in: PubMed   Mentions: 9     Fields:    Translation:HumansCells
    43. Drug discovery research targeting the CXC chemokine receptor 4 (CXCR4). J Med Chem. 2012 Feb 09; 55(3):977-94. PMID: 22085380.
      View in: PubMed   Mentions: 29     Fields:    Translation:HumansAnimalsCells
    44. Role of CXCR4 internalization in the anti-HIV activity of stromal cell-derived factor-1a probed by a novel synthetically and modularly modified-chemokine analog. Exp Biol Med (Maywood). 2011 Dec; 236(12):1413-9. PMID: 22101518.
      View in: PubMed   Mentions: 7     Fields:    Translation:HumansCells
    45. Biology and clinical relevance of chemokines and chemokine receptors CXCR4 and CCR5 in human diseases. Exp Biol Med (Maywood). 2011 Jun 01; 236(6):637-47. PMID: 21565895.
      View in: PubMed   Mentions: 17     Fields:    Translation:HumansAnimalsCells
    46. Crystal structure and structural mechanism of a novel anti-human immunodeficiency virus and D-amino acid-containing chemokine. J Virol. 2007 Oct; 81(20):11489-98. Liu D, Madani N, Li Y, Cao R, Choi WT, Kawatkar SP, Lim MY, Kumar S, Dong CZ, Wang J, Russell JD, Lefebure CR, An J, Wilson S, Gao YG, Pallansch LA, Sodroski JG, Huang Z. PMID: 17686848.
      View in: PubMed   Mentions: 11     Fields:    Translation:HumansCells
    47. Drug Discovery Research: New Frontiers in the Post-Genomic Era. Chapter 12: Basic and Translational Research of Chemokine Ligands and Receptors and Development of Novel Therapeutics. 2007; 300-335. Choi WT, Kumaki Y, Kumar IM, An J, Richman DD, Sodroski JG, Huang Z. View Publication.
    48. Neuronal apoptotic signaling pathways probed and intervened by synthetically and modularly modified (SMM) chemokines. J Biol Chem. 2007 Mar 09; 282(10):7154-63. Choi WT, Kaul M, Kumar S, Wang J, Kumar IM, Dong CZ, An J, Lipton SA, Huang Z. PMID: 17218311.
      View in: PubMed   Mentions: 10     Fields:    Translation:Cells
    49. Design and synthesis of novel chemokine analogs derived from vMIP-II. Protein Pept Lett. 2006; 13(5):499-501. Wang J, Kumar S, Choi WT, Dong C, Huang Z. PMID: 16800805.
      View in: PubMed   Mentions:    Fields:    Translation:HumansCells
    50. SMM-chemokines: a class of unnatural synthetic molecules as chemical probes of chemokine receptor biology and leads for therapeutic development. Chem Biol. 2006 Jan; 13(1):69-79. Kumar S, Choi WT, Dong CZ, Madani N, Tian S, Liu D, Wang Y, Pesavento J, Wang J, Fan X, Yuan J, Fritzsche WR, An J, Sodroski JG, Richman DD, Huang Z. PMID: 16426973.
      View in: PubMed   Mentions: 17     Fields:    Translation:HumansCells
    51. Different stereochemical requirements for CXCR4 binding and signaling functions as revealed by an anti-HIV, D-amino acid-containing SMM-chemokine ligand. J Med Chem. 2005 Dec 15; 48(25):7923-4. Dong CZ, Kumar S, Choi WT, Madani N, Tian S, An J, Sodroski JG, Huang Z. PMID: 16335916.
      View in: PubMed   Mentions: 8     Fields:    Translation:HumansCells
    52. Unique ligand binding sites on CXCR4 probed by a chemical biology approach: implications for the design of selective human immunodeficiency virus type 1 inhibitors. J Virol. 2005 Dec; 79(24):15398-404. Choi WT, Tian S, Dong CZ, Kumar S, Liu D, Madani N, An J, Sodroski JG, Huang Z. PMID: 16306611.
      View in: PubMed   Mentions: 35     Fields:    Translation:HumansCells
    53. Distinct functional sites for human immunodeficiency virus type 1 and stromal cell-derived factor 1alpha on CXCR4 transmembrane helical domains. J Virol. 2005 Oct; 79(20):12667-73. Tian S, Choi WT, Liu D, Pesavento J, Wang Y, An J, Sodroski JG, Huang Z. PMID: 16188969.
      View in: PubMed   Mentions: 33     Fields:    Translation:HumansCells
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